code: def tokenizer(self, tokens):
      raise NotImplementedError
  
imports: import math
  import random
  import numpy
  import pandas
  from multiprocessing.dummy import Pool
  from nlpaug.util import Action, Method, WarningException, WarningName, WarningCode, WarningMessage
label_desc: Use image node_id 13 for calling the Augmenter obj's underlying member method code with example usage: obj.tokenizer(tokens) without return types